Multi focal lens design, history and optical principles

Multi-focal lens design, history and optical principles

Optical principles of multifocal lens design ,[object Object]

Franklin’s Bifocal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solid Up curve Bifocal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Perfection Bifocal ,[object Object],[object Object],[object Object],[object Object]

Cemented Kryptok Bifocal ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],F2 F1 F3 F4

First commercial Kryptok Bifocal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

First commercial Kryptok Bifocal ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],F1/ ω 2=-f2/ ω 2

Straight top bifocal ,[object Object],[object Object],[object Object]

Ultex lenses ,[object Object],[object Object],[object Object]

Executive bifocals ,[object Object],Cu Cs Ru Rs

Double segment bifocals ,[object Object],[object Object],[object Object],[object Object]

Trifocals Addition requiring more than +1.75DS 6-8mm segment height

Performance of multifocal lens

Optical performance of a bifocal lens can be considered in terms of ,[object Object],[object Object],[object Object],2 bifocal lens may have three centers 1) dist optical center 2) seg optical center 3) resultant optical center

Multi focal lens design, history and optical principles

Empfohlen

Empfohlen

Weitere ähnliche Inhalte

Andere mochten auch

Andere mochten auch (18)

Ähnlich wie Multi focal lens design, history and optical principles

Ähnlich wie Multi focal lens design, history and optical principles (20)

Mehr von GauriSShrestha

Mehr von GauriSShrestha (20)

Kürzlich hochgeladen

Kürzlich hochgeladen (20)

Multi focal lens design, history and optical principles